Coaster-brake.



H F YOUNGS.

COASTER BRAKE. APPLICATION FiLED 1uu: 24. n15.

Patented May 29,- 1917.

H- F YOUNG PATENT onnron.

HARRY F. YOUNGS, OF SANTA CRUZ CALIFORNIA.

COASTER-IBRAKE. v

Specification of Letters Patent.

Patented May 29, 1917.

Application filed June 24,1915. Serial meme.

To all whom/it may concern: I

Be it known that I, HARRY F. Yonives, a citizen of the United States, residing at Santa Cruz in the county of Santa Cruz and State of California, have invented certain new and useful Improvements in Coaster-Brakes, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in coaster brakes and has relation more particularly to a device of this general. character especially designed and adapted for use in connection with bicycles; and it is an object of the invention to provide a device of this general character of a novel and improved construction which may be readily and eflectively applied to the hub of the rear or driving wheel of abicycle.

It is also an object of the invention to rovide a device of this general character aving novel andimproved means whereby the same may be operated to permit coastin and whichflmay also be operated to a 0rd a brake.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved brake whereby certain important advantages are attained and the device is rendered simpler, less expensive and otherwise more convenient and advantageous for iflse, {1111 as will be hereinafter more fully set ort The novel features of the invention will hereinafterbe definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein- Figure'l'is a sectional view taken through a coaster brake constructed in accordance with an embodiment of my invention;

Fig, 2 'is' a view partly in elevation and partly ,in'section of the inner section of my improved coaster brake Fig. 3 is an inside elevational view of the outer section of my improved coaster brake; I Fig. 4: is an inside elevational view of the cap herein employed together with the brake band coact g here ith;

Fig. 5 is an enlargedsectional view taken substantially on the line'5-5 of Fig. 2; and

Fig. 6 is a view in side elevation of the ratchet member herein embodied and which coacts with the brake band.

As disclosed in the accompanying drawings, B denotes an annular section or member internally threaded, as at m, to afford means whereby the same may be readily engaged with the hub of the rear or driving wheel of a bicycle or the like. Snugly surrounding the section or member B and capable of rotation therearound with a minimum of friction is the annular member or section A having teeth radiating there from so that said member A may be engaged with a drive chain as generally employed in connection with bicycles, although I do not wish to be understood as limiting myself in this particular respect.

E denotes an annular section or member provided with the internal threads 'n, whereby the same may also be readily engaged with the hub of a driving wheel, and asis particularly illustrated in Fig. 1 of the accompanyin drawings, it is to be noted that the threa s m and n are reversely directed, the threads m being right hand and the threads 07. left hand. It is also thought to be proper that the sections or members B. and E be identified, when in assembled relation, as'a hub member. It will therefore be at once understood that the member or section E serves as a lock memher for maintaining thesection or member Bin applied position upon the hub.

The inner portion of the section or member E is angularly reduced to afford a neck 2, and rotatably engaged upon said neck 2- is the annular member D provided in its inner face with the notches or recesses g which extend across the surface of the member D and gradually slope upwardly in one direction through the inner surface of said member as is believed to beparticularly illustrated in Figs. 3 and 6.

The outer face of the annular member or section A has produced therein a substan-' tially rectangular recess d in=which is pivotally mountedthe dog'or pawl 6. .An end portion of said dog or pawl e is constantly inw r y, W t a 11 through the medium of the spring f so that when the member or section A is rotated rearwardly as by a back pedaling action it will be perceived that the pawl or dog 6 will be engaged with one of the notches or re cesses g to cause the member D to move in unison therewith. It will also be self-evident that as the member or section A moves forwardly the same will rotate independently of the member D. I

Extending laterally from a peripheral portion of the member D and overlying the outer peripheral portion of the member E, is the pin or tooth h which is adapted to be directed through the loop 0 arranged at the free end portion of the brake band i, the opposite end portion of said brake band being suitably anchored or attached, as at 3, to the side wall or flange 4 of the cap member 0 when the same is in applied position.

The cap member C, when in applied position, houses the members D and E and said cap member C is provided with the outstanding lug or knob Z angular in cross section and positioned at one side of the axial center of the cap and which is adapted to extend within the-slot or kerf of an ordinary type of bycycle frame whereby said cap member 0 is maintained against axial rotation. The cap member C is also provided with the opening 5 arranged at its axial center and through which the axle of the driving wheel is adapted to extend.

It is thought to be self-evident that upon rotating the member or section A rearwardly, the resultant movement imparted to the member D willv cause the band 11 to frictionally engage the adjacent periphery of the member E to effect a braliing action. It is preferred that the inner face of the band 2' be provided with a fiber lining j and the coacting periphery of the member E be provided with a similar lining or covering 7c in order to facilitate or enhance the frictional coaction between said band 2' and the member E. a

The inner edge of the member or section A is provided with the ratchet notches 0 preferably four in number and equidistantly spaced and which are adapted to receive the free extremities of the dogs or pawls a carried by the member B, said dogs or pawls a being preferably two in number and diametrically opposed.

The free extremities of the dogs or pawls a are constantly urged outwardly through the medium of the Springs 6, and it is to be noted that the pawls or dogs a and the coacting notches 0 are so related as to cause the members or sections A and B to rotate in unison in a forward direction and to permit the member orsection A to rotate independently of the member B upon back pedaling or rearward rotation being given to said section or member A. It will also be around the hub member and at once self-evident that upon the member or section A being held against rotation, the coaction between the pawls or dogs a and the notches c are such as to permit the member or section B to rotate in a forward direction.

From the foregoing description, it is thought to be obvious that a brake constructed in accordance with my invention is of an extremely simple and comparatively inexpensive nature and is particularly well adapted for use by reason of the convenience and facility with-which it may be assembled, and it will also be obvious that my invention is susceptible of some change and modification without material departure from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice, except as hereinafter claimed.

I claim: I

1. In a coaster brake, a hub member, an annular member rotatably supported by said hub member, said last named member being provided with driving means, coacting means carried by the hub member and the annular member for causing the same to rotate in unison in one direction, a second annular member rotatably supported by the hub member and provided in its inner face with beveled recesses, face of the first named annular member and coacting with the recesses of the second annular member for causing both of said an nular members to rotate in unison in one direction but opposite to the direction of unitary movement of the hub member and the first named annular member, a cap inclosing the outer portion of the hub member and the second named annular member, and a brake band secured to the cap and disposed engaged with the second named annular member whereby the unitary movement of both of said annular members causes the brake band to frictionally engage the hub member.

2. In a coaster brake, ahub member, an annular member rotatably supported by said a pawl carried by the outer hubmember, said last named member being provided with driving means, coacting means carried by the hub member and the annular member for causing the same to rotate in unison in one direction, a second annular provided in its inner face with i first named annular member, a cap inclosing ally engage the hub member, and an out- 10 the outer portion of the hub member and standing lug carried by the cap member at the second named annular member, a brake one side of its axial center to afford means band secured to the cap and disposed around to hold said cap against axial rotation.

5 the hub member and engaged with the sec- HARRY F, YOUNGS.

0nd named annular member whereby the Witnesses:

unitary movement of both of said annular C. G. DAKE,

members causes the brake band to friction- LUCAS F. SMrrH; Jr.

Copies of this patent may be obtained for live cents each, by addressing the "Commissioner of Patents,

. Washington, D. O. a 

